Question: Draw a diagram showing the relationships for all the tables.The following tables need to be modified as shown (primary key attributes are bold, foreign key attributes are in italics):CID in Retail and Wholesale are defined as a primary key and a foreign key.CUSTOMER (CID, Name, Address)PHONE (PhoneNumber, Description, CID)RETAIL (CID, Type)WHOLESALE (CID, ContractID)CONTRACT (ContractID, Description)OLDCONTRACT (ContractID, Description)ORDER (OID, OrderDate, CID)PRODUCT (PID, Name, Price)DIVISION (DID, Name, Address)LINEITEM (OID, PID, Quantity, AmountCharged)PRODUCTION (DID, PID, Quantity, Rating)One-to-one RelationshipIf the foreign key will be the primary key or part of the primary key, choose the Identifying Relationship 1:1 icon. Otherwise, choose the Non-Identifying Relationship 1:1 icon.

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Answered: Question: Draw a diagram showing the…

Computer Networking: A Top-Down Approach (7th Edition)

7th Edition

ISBN:9780133594140

Author:James Kurose, Keith Ross

Publisher:James Kurose, Keith Ross

Chapter1: Computer Networks And The Internet

Section: Chapter Questions

Problem R1RQ: What is the difference between a host and an end system? List several different types of end...

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If an employee can work for only one department and a department can have many employees (one to many relationship). Which answer the relationship table "work" that has the best values to describe the relationship between employee and department? The employee table has two columns (eid, name) with records ('E1','A'), ('E2','B'), ('E3','C'). The department table has two columns (did, name) with records ('D1','X'), ('D2','Y'), ('D3', 'Z'). work(eid, did) with values ('E1','D1'), ('E1','D2'), ('E2,'D2'). work(eid, did) with values ('E1','D1'), ('E2','D2'), ('E3,'D2'). work(eid, did) with values ('E1','D1'), ('E2','D2'), ('E2,'D3'). work(eid, did) with values ('E1','D1'), ('E2','D2'), ('E3,'D3').
which rules apply to desigining table with less redundancy? a) Binary Relationship b) Reflective Relationship c) Weak entity d) Normal form
What are three cases when a surrogate key might be used in place of a relation's main key?
Which statement is associated with two seperate entities. a) Attribute b) Entity Type c) Reflective Relationship d) Relationship
Instructions: In this assignment, you will convert an Entity-Relationship diagram into a set of related tables. Given the following ERD, write the table definitions for the entities displayed below. You do not have to indicate data types nor “not null” constraints in this lab. Use the format TableName ( attribute, attribute…attribute). Designate primary keys with an underline and foreign keys with a broken underline. To illustrate, the Regions and Countries table definitions have been created for you below the diagram. Type your answers in this document and upload it to the appropriate Blackboard assignment link by Monday at 11:59 p.m. ET of this module/week. Note that you should read the “Table Conversions Explained” document in your Reading & Study folder. I created it to help you better understand how ERDs will ultimately be transformed into real tables. ERD for the Hourglass timekeeping database
WHAT IS THE RELATIONSHIP THIS TABLE ZERO TO MANY OPTIONAL ? ONE TO MANY ? ONE MANDATORY ? ONE TO ONE ? ONE ? ZERO TO ONE ? MANY ? MANY TO MANY ? ONE OPTIONAL TO MANY OPTIONAL ? ONE MANDATORY TO MANY OPTIONAL ? MANY)
StayWell also rents out properties on a weekly basis to students attending summer school in the Seattle area. Design a database to meet the following requirements, using the shorthand representation and a diagram of your choice. For each student renter, list his or her number, first name, middle initial, last name, address, city, state, postal code, telephone number, and e-mail address. For each property, list the office number, property address, city, state, postal code, square footage, number of bedrooms, number of floors, maximum number of persons that can sleep in the unit, and the base weekly rate. For each rental agreement, list the renter number, first name, middle initial, last name, address, city, state, postal code, telephone number, start date of the rental, end date of the rental, and the weekly rental amount. The rental period is one or more weeks.
Primary key identifies a unique tuple of a relation, true or false?
SQL Queries: Given the following schema. Primary keys are underlined and highlighted in yellow and foreign keys are bold. The meaning of the relations is straightforward. Medical_Staff(MS_Id, MS_First, MS_Last, MS_PhoneNumber, MS_Occupation, Salary) Blood_Bank(Bank_Id, Bank_Name, Bank_Street, Bank_City, Bank_St, Bank_PhoneNumber) Donor(Donor_Id, Donor_First, Donor_Last, Donor_BloodType, Donor_City, Donor_St, DOB, TotalNumberOfDonations) Donation_Record(Donor_Id, Donation_Date, Donation_Amount) Employee(MS_Id, Bank_Id) Storage(Donor_Id, Donation_Date, Bank_Id) Write SQL queries to answer the following questions: a.Find the average donation amount for Sue Thompson (Donor Id = 3329) for the year 2018. b.Sum all donations by Bank for each State (i.e. the State the blood bank is located in, not the Donor). c.Find the name of the youngest donor and all the donations made in by that donor in 2020.
Review the SaleItem relation below where ItemNumber plus OrderNumber is the primary key. What type of primary key does this relation have? SALEITEM (ItemNumber, OrderNumber, Quantity, Price) Group of answer choices Composite primary key Surrogate primary key Transitive primary key Alternate primary key
1)A tuple is a named column of a relation. True or alse2)Each attribute in a relation has a distinct name. T/F3)The degree of a relation is the number of attributes it contains. T/F4)A foreign key is the candidate key that is selected to identify tuples. T/F
PLz help with the following: Translate your ER diagram into a relational schema in the form of SQL DDLs. Choose appropriate data types for each attribute and include primary key and foreign key constraints, Check and Not Null constraints.

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